He found that the length of time it takes a sound's echo to decay is determined by the absorption of the sound's original energy by surrounding material.
他发现，声音回声衰减的时间长短取决于周围物质对声音原始能量的吸收。
You can play with the effect by changing the delay time, decay factor, and clicking Preview until you have the exact sound effect you want.
您可以通过更改延迟时间、衰减系数和单击p review播放效果，直到您获得想要的音效为止。
But that assumption was challenged in an unexpected way by a group of researchers from Purdue University who at the time were more interested in random Numbers than nuclear decay.
但是普渡大学的一组研究者用意想不到的方式挑战了衰变速率恒定这个假设。相比于原子核衰变，他们对随机数更感兴趣。
This effect can be measured in either the time domain by observing the rate of decay of voltage or in the frequency domain by measuring phase shifts between sinusoidal currents and voltages.
这个效应可以在时间域通过观测电压的衰变率来测量，也可以在频率域通过正弦电流和电压之间的相变来测量。
Having sealants put on teeth before they decay will also save time and money in the long run by avoiding fillings, crowns, or caps used to fix decayed teeth.
在牙齿遭受侵蚀前就涂上保护胶，从长远看，能够通过避免填充、修补牙冠等修复受损牙齿的需要来节省时间和金钱。
By analyzing the simulating results, the dependence of free photoelectron decay time on simulating parameters is gotten, which is the basis to decide the parameters for practical emulsions.
通过分析模拟结果，确定了自由光电子衰减时间和模拟参数的对应关系，从而为确定具体乳剂中的参数提供依据。
The morphology, structure, and photoluminescence(PL) of the phosphors were investigated by transmission electron microscope(TEM), X-ray diffraction(XRD), emission spectra, and decay time.
以X射线衍射（XRD）、透射电子显微镜（TEM）、发射光谱和衰减时间谱等手段表征材料性能。
By using the perturbed-energy method, the exponential decay of the solution is obtained for the nonlinear wave equations with time-dependent coefficients and dissipative boundary condition.
利用能量法证明了具耗散边界条件和时间依赖系数的非线性波方程的能量指数衰减性。
Hold the bottle; don't prop it up by itself. This can help prevent choking, extra gas, tooth decay, and provide bonding time.
握紧奶瓶，不要让它自己滴下来，这样能防止窒息，过多的气体，牙齿的腐蚀，而提供了亲子联系的时间。
We also consider the effect of vortex decay over time caused by the viscidity of atmosphere in our vortex model in estimating the vortex effect experienced during the close proximity formation flight.
在估算紧密编队飞行中长机翼尖涡对僚机的影响时，本文在所用到涡模型中也考虑了由空气粘性引起的涡流随时间的衰减效应。
By using one-dimension FDTD method we simulates the decay of double exponential pulse through the soil media, and its refractive time-domain wave shape is discussed in detail.
用一维FDTD方法模拟了双指数脉冲在单层岩土介质中的衰减，并对电磁波在岩土层中的穿透进行了详细的讨论。
The stability criteria and the decay time constant of the nutation damping are obtained in an analytical form, by which the degree of the attitude stability can bd evaluated.
导出解析形式的稳定性判据和章动阻尼时间常数，可用以估计卫星的稳定度。
Based on the generalized dynamic inflow theory and classic non-steady aerodynamic loading theory, a real time model is obtained by establishing wake distortion and decay.
在广义动态入流理论的基础上，基于经典非定常气动载荷理论，建立了尾迹畸变和尾迹耗散的实时分析模型。
Many photographs of out let flow field and flame after different decay space were presented by use of YA-16 high speed camera with multi-flashes in an opposite photograph and time accumlate camera.
采用YA-16多闪光高速摄影反相拍摄导爆管经过不同的消爆空间后出口流场的动态结构，以及出口火焰在持续时间内的累积照片，从有利于点燃延期药的角度出发，对出口流场进行了研究。
This log has been replaced by the neutron -lifetime and neutron-decay-time logs.
氯测井已经被中子寿命测井和热衰减时间测井所代替。
This study showed that the greater the pressure and the longer the pressure time, the more the latent image decay and the less is the image density generated by developing X ray films.
对压力引起X线胶片潜影衰退的影响进行研究，得出压力越大、受压时间越长、潜影衰退越甚。
The equivalent time constants are derived from the decay characteristics of the induced current. The resistance and inductance can be given by calculating the eddy current loss an…
等效时间常数可以从感应电流自然衰减特性得到，电阻和电感则通过计算被动反馈线圈中涡流损耗和磁场能量中求得。
The equivalent time constants are derived from the decay characteristics of the induced current. The resistance and inductance can be given by calculating the eddy current loss an…
等效时间常数可以从感应电流自然衰减特性得到，电阻和电感则通过计算被动反馈线圈中涡流损耗和磁场能量中求得。
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